catch errors on open

[zhirafovod]

Description

> .open
Error reading directory /Users/sesergee/projects/sandbox/stated-js/example: Error: ENOENT: no such file or directory, scandir '/Users/sesergee/projects/sandbox/stated-js/example'
Changed directory with .cd or .open an/existing/directory
> .open blah
Error reading directory blah: Error: ENOENT: no such file or directory, scandir 'blah'
Changed directory with .cd or .open an/existing/directory

Type of Change

• Bug Fix
• New Feature
• Breaking Change
• Refactor
• Documentation
• Other (please describe)

Checklist

• I have read the contributing guidelines
• Existing issues have been referenced (where applicable)
• I have verified this change is not present in other open pull requests
• Functionality is documented
• All code style checks pass
• New code contribution is covered by automated tests
• All new and existing tests pass